This delightful loop turns a crowded board into an engine of endless green energy, all thanks to Circle of Dreams Druid tapping to produce a massive wave of mana based on your creature count. Temur Sabertooth provides the escape hatch, scooping up the Druid to protect it while setting up the next cast, while Thousand-Year Elixir ensures the Druid can tap the very moment it re-enters the battlefield without waiting to summon. By cycling the Druid back and forth between hand and battlefield, you effortlessly generate infinite green mana along with an endless stream of creature enters-the-battlefield and leaves-the-battlefield triggers.